\begin{twocollist}
\twocolitem{\textbf{Advanced options}}{By default, this is turned off in new installations.
These advanced options are not required for normal simulations. When \texttt{Advanced
-Options} is set, \ctsim\ will display more options during scanning of programs and
+Options} is set, \ctsim\ will display more options during scanning of phantoms and
the reconstruction of projections.}
\twocolitem{\textbf{Ask before deleting new documents}}{By default, this is turned on in